Gas-phase radical formation during the reactions of methane, ethane, ethylene, and propylene over selected oxide catalysts
Journal Article
·
· J. Phys. Chem.; (United States)
The formation of surface-generated gas-phase radicals during the reactions of methane, ethane, ethylene, and propylene over Bi/sub 2/O/sub 3/, ..gamma..-Bi/sub 2/O/sub 3/ x MoO/sub 3/, PbO, MgO, and Li/MgO was examined by EPR matrix isolation spectroscopy. Allyl radicals were detected during the reaction of propylene over all of the oxides examined. Gas-phase methyl and ethyl radicals were detected during the reactions of methane and ethane, respectively, over MgO and Li/MgO while Bi/sub 2/O/sub 3/, ..gamma..-Bi/sub 2/O/sub 3/ x MoO/sub 3/, and PbO were essentially inactive. Gas-phase vinyl radicals were not detected during the reaction of ethylene over any of the oxides. These differences in reactivity are attributed to differences in reactivity of the oxide ions on these surfaces towards hydrogen atom abstraction. 28 references, 1 figure.
- Research Organization:
- Texas A and M Univ., College Station
- OSTI ID:
- 6307139
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 89:21; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Thu Dec 31 23:00:00 EST 1992
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OSTI ID:6688083
Related Subjects
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALKENES
ALKYL RADICALS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
ELECTRON SPIN RESONANCE
ETHANE
ETHYL RADICALS
ETHYLENE
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROCARBONS
INFORMATION
LEAD COMPOUNDS
LEAD OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC RESONANCE
METHANE
METHYL RADICALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROPYLENE
RADICALS
REFRACTORY METAL COMPOUNDS
RESONANCE
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VINYL RADICALS
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALKENES
ALKYL RADICALS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
ELECTRON SPIN RESONANCE
ETHANE
ETHYL RADICALS
ETHYLENE
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROCARBONS
INFORMATION
LEAD COMPOUNDS
LEAD OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC RESONANCE
METHANE
METHYL RADICALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROPYLENE
RADICALS
REFRACTORY METAL COMPOUNDS
RESONANCE
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VINYL RADICALS